Online Computer Science Test - Object Oriented Programming Test 1

Instruction:

This is a FREE online test. Beware of scammers who ask for money to attend this test.
Total number of questions: 20.
Time allotted: 30 minutes.
Each question carries 1 mark; there are no negative marks.
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All the best!

1.

If you design a class that needs special initialization tasks, you will want to design a(n) _____

housekeeping routine

initializer

constructor

compiler

[#]

2.

Redirection redirects

a stream from a file to the screen

a file from a device to a stream

a device from the screen to a file

the screen from a device to a stream

[#]

3.

If you declare two objects as Customer firstCust, secondCust; which of the following must be true?

Each object's nonstatic data members will be stored in the same memory location

Each object will be stored in the same memory location

Each object will have a unique memory address

You cannot declare two objects of the same class

[#]

4.

A compound statement does not consist of

a single statement

other compound statements

expression statements

control statements

None of the above

[#]

5.

Which of the following while clause will stop the loop when the value in the age variable is less than the number 0?

while age < 0

while (age < 0)

while age >= 0;

while (age >= 0);

while (age >= 0)

[#]

6.

Which of the following statements will display the word "Hello" on the computer screen?

cin << "Hello";

cin >> "Hello";

cout << "Hello";

cout >> "Hello";

None of the above

[#]

7.

The continue statement should be written only

in the body of a loop.

in the nested loops

outside the body of a loop

any where

None of the above

[#]

8.

The most common operation used in constructors is _____

addition

overloading

assignment

polymorphism

[#]

9.

If an integer object is thrown with a throw statement, then a subsequent catch block has a usable match if the type of the catch argument is _____

const int &

int &

either (a) or (b)

neither (a) nor (b)

[#]

10.

The statement int num[2][3]={ {3,8,6}, {9,4,7}};

assigns a value 4 to num[1][2]

assigns a value 7 to num[1][2]

assigns a value 8 to num[1][2]

assigns a value 9 to num[1][2]

[#]

11.

The end of string is recognized by

the null character

the newline character

the $ sign

the / sign

None of the above

[#]

12.

Which of the following C++ expressions will find the square root of the number 16?

pow (16, 2) (b) root (16, 2)

sqroot (16)

sqrt (16, 2)

sqrt (16)

[#]

13.

The arguments that determine the state of the cout object are called _____

classes

manipulators

format flags

state controllers

[#]

14.

Making class members inaccessible to nonmember functions is an example of

polymorphism

data hiding

redundancy

recursion

[#]

15.

Assume that your version of C++ can recognize only the first 8 characters of an identifier name, through identifier names may be arbitrarily long. Which of the following identifier names is not distinct:

list, list2

address, Address

identifier_l, identifier_2

answer, ANSWER

None of the above

[#]

16.

The string HELLO WORLD needs

11 bytes

12 bytes

10 Bytes

8 bytes

None of the above

[#]

17.

The null character is represented by

\n

\0

\o

\r

None of the above

[#]

18.

The C++ keyword for declaring a variable that contains a decimal point is _____

dec

decimal

float

floater

None of the above

[#]

19.

Which is a good guideline for creating function names?

Use all lowercase letters to identify the functions as C++ functions

Use long names to reduce the likelihood of creating a duplicate function name

Use abbreviations as much as possible to save both keystrokes and memory

Avoid the use of digits because they are easily confused with letters

[#]

20.

To write data that contains variables of type float, to an object of type ofstream, you should use

the insertion operator

seekg()

writeQ

put()

[#]

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